Extra-cardiac impedance based hemodynamic assessment method and system
First Claim
1. A medical device comprising:
- a lead assembly configured to be at least partially located proximate to the heart, the lead assembly including an extra-cardiac (EC) electrode to be positioned proximate to at least one of a superior vena cava (SVC) and a left ventricle (LV) of a heart, the lead assembly including a subcutaneous remote-cardiac (RC) electrode configured to be located remote from the heart such that at least a portion of the greater vessels are interposed between the RC electrode and the EC electrode to establish an extra-cardiac impedance (ECI) vector, anda processor module to measure extra-cardiac impedance along the ECI vector to obtain ECI measurements, the processor module assessing a hemodynamic performance assessment based on the ECI measurements.
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Accused Products
Abstract
A medical device is provided that comprises a lead assembly configured to be at least partially located proximate to the heart. The lead assembly includes an extra-cardiac (EC) electrode to be positioned proximate to at least one of a superior vena cava (SVC) and a left ventricle (LV) of a heart. The lead assembly includes a subcutaneous remote-cardiac (RC) electrode configured to be located remote from the heart such that at least a portion of the greater vessels are interposed between the RC electrode and the EC electrode to establish an extra-cardiac impedance (ECI) vector. The processor module measures extra-cardiac impedance along the ECI vector to obtain ECI measurements. The processor module assesses a hemodynamic performance based on the ECI measurements.
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Citations
20 Claims
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1. A medical device comprising:
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a lead assembly configured to be at least partially located proximate to the heart, the lead assembly including an extra-cardiac (EC) electrode to be positioned proximate to at least one of a superior vena cava (SVC) and a left ventricle (LV) of a heart, the lead assembly including a subcutaneous remote-cardiac (RC) electrode configured to be located remote from the heart such that at least a portion of the greater vessels are interposed between the RC electrode and the EC electrode to establish an extra-cardiac impedance (ECI) vector, and a processor module to measure extra-cardiac impedance along the ECI vector to obtain ECI measurements, the processor module assessing a hemodynamic performance assessment based on the ECI measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for assessing hemodynamic stability, comprising:
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providing a lead assembly configured to be at least partially located proximate to the heart, the lead assembly including an extra-cardiac (EC) electrode to be positioned proximate to at least one of a superior vena cava (SVC) and a left ventricle (LV) of a heart, the lead assembly including a subcutaneous remote-cardiac (RC) electrode configured to be located remote from the heart such that at least a portion of the greater vessels are interposed between the RC electrode and the EC electrode to establish an extra-cardiac impedance (ECI) vector; measuring extra-cardiac impedance along the ECI vector to obtain ECI measurements; assessing hemodynamic performance based on the ECI measurements. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification